JPS588419A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To enable zone air conditioning appropriate to the desire of each of persons in an automobile, by providing an air conditioner with a plurality of temperature controllers and supplying air in blowoff directions corresponding to the temperatures of the blown-off air, from blowoff means for air-conditioned zones. CONSTITUTION:Air whose temperature is controlled by an evaporator 12, a heater 13 and an air mix damper 14 flows through passages 10e, 10f and is blown off into a driver's seat zone and an assistant driver's seat zone through a vent blowoff port 29a or a heat blowoff port 29b in a driver's seat flowoff port group 29 and a vent blowoff port 30a or a heat blowoff port 30b in an assistant driver's seat blowoff port group 30. These blowoff ports are provided by branching the passages 10e, 10f. Changeover dampers 28a, 28b are installed as distributors at the branching points to select blowoff modes for the air- conditioned zones.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an air conditioner for automobiles in which one air conditioner F has a plurality of temperature control devices and thereby blows air at nine different temperatures to each air conditioning zone. ◎ Regarding the device (hereinafter referred to as car air conditioner): One of the requirements for car air conditioners is to perform different temperature adjustments for multiple occupants in the vehicle interior. Therefore, a car air conditioner has been developed in which a single air conditioner F is provided with a plurality of temperature control devices, thereby blowing air at different temperatures to a number of air conditioning zones. A device that uses one air conditioning unit in this way is space efficient, has a small number of parts, and is economical, even when a plurality of completely independent air conditioning units are provided.

An object of the present invention is to provide an automatic control pipe that automatically changes the vertical level of air supply to each air conditioning zone in a car air conditioner equipped with one air conditioning unit and a plurality of temperature control devices. It is.

That is, by controlling each of the plurality of distribution devices according to the temperature joint amount of each of the plurality of temperature joint devices, the blowing air temperature and blowing direction (
The feature is that the correspondence between the vertical level and the vertical level can be switched individually and accurately.

According to the invention, the air conditioning zone may be larger than
For example, two are provided. The first one. Facing the 8th air conditioning zone, the 1st. A second air blowing device is provided respectively, and a second air blowing device is provided, corresponding to each blowing device. @H temperature control device is prepared. Each blowing device has a first air blower for selecting pent blowing and heat blowing to each air conditioning zone. ts
Equipped with a distribution device. An electrical control device is provided;
The first and third temperature joint devices and the first and third temperature joint devices. and a third dispensing device.

According to a preferred embodiment, the air passage inside the air conditioning unit is at least partially divided into two by the partition member. A temperature control device consisting of a heater core and an air damper is provided in each of the eight divided passages. As the heater core, it is possible to use one heater core arranged so that the partition plate is inserted thereinto.

The electric control device controls the first temperature according to the required set temperature or measured temperature in each air conditioning zone. The winter air hawk damper of the second temperature control device is controlled. As a result, blown air having a temperature of 0 is obtained in each blowing device. An electric control device controls the distribution device in response to the air temperature for each blowing device.

In this case, if the insulation is not perfect in the heater core or inside the air conditioning unit, the two air flows will thermally influence each other, and the temperature of the blown air may change depending on the opening degree of the main air closing pump. arise. In the embodiments to be described later, the operating point is distorted at every minute for this reason, and as a result, leakage air is blown out from the pen Y outlet, and cold air is blown out from the heat outlet. It's being done. In other words, the operating point of the distribution device is corrected by an amount commensurate with the deviation in the opening degrees of the eight air valve lid dampers.

1111m is an overall configuration diagram showing one embodiment of the present invention. In this figure, 1) is a Dalian wind duct placed in the front part of the passenger compartment, and upstream thereof is a 16m intake port for outside air and an air duct for inside the passenger compartment. It is divided into an intake port Iob and an internal/external air switching damper 1.
0o selects between the state of intake of air outside the vehicle interior and the state of intake of air inside the vehicle. The damper 10 may be manually operated by a mechanical link. 11
A cW is sent to the passenger compartment inside the ventilation duct 1G using a four-way motor.
i Create an airflow (from left to right).

Reference numeral 13 denotes an evaporator as a cooling heat exchanger, which together with a compressor driven by an on-vehicle engine, an electromagnetic clutch, and other parts (not shown) constitutes a known air cooling device. Cooling flow. A heater 18 serves as a heating heat exchanger, and circulates the cooling water of the vehicle engine as a heat source. The heater is fitted into a hole provided in a partition plate 1011 that divides the interior of the unit into two downstream of the evaporator 18, and the three passages 1 (1@, 10f) each have a protruding portion 11&.

18b.

14a, 14b An air mix damper serving as a temperature control member allows the air cooled by the evaporator ljl to flow through the heater 1.
By changing the rate of reheating in lla, 18'b and the rate of passing directly through the bypass passage for each passage 10. Adjust to 8 commuting hours. In this embodiment, the partition plate 10 is arranged so that its longitudinal direction is in the left-right direction of the vehicle, and the partition plate 10 (l is formed in the horizontal direction relative to the exit value).

Evaporator 11. Heater 18. The blown air whose temperature has been adjusted by the air mix damper 14 is
Through l□f, the vent outlet fi9m or the first outlet 9b in the driver's seat outlet group 19&: or the vent outlet 80m or the second outlet 8ob in the passenger seat outlet group 8o), They are blown out to the driver's seat air conditioning zone and passenger seat air conditioning zone, respectively. Each of these outlets is passage 1o.
.

A switching damper is formed as a distribution device at the distribution point. 8a+jllllb are respectively arranged to select the air outlet amount in each air conditioning zone.

1M is an analog electric signal (〒r
) (In this embodiment, only one is used, but it may be provided for each air conditioning zone. 16 is an outside temperature sensor that generates an analog electric signal (Jan) corresponding to the air temperature outside the vehicle. , 1? is a solar radiation sensor that generates an analog electric signal (Ts) corresponding to the thermal radiation or light amount of solar radiation incident on the vehicle interior, a water temperature sensor that generates an analog electric signal (Tw) corresponding to the inlet water temperature of the 1sjt heater 18, 19 An evaporator outlet temperature sensor 81a generates an analog electrical signal (Tm) corresponding to the evaporator outlet air temperature.

2+111 is an analog electric signal (Mrs, Ar,
).

The electrical signals generated by each of these sensors are converted into an output code signal by an analog-to-digital conversion circuit go. 8
1 is Air Lord Tutasudamba 14 &.

In addition to controlling the position of b, the air outlet switching damper 5sas
In the process of performing arithmetic processing according to the control deltagrams set in advance in the internal memory, the digital computer that controls bt sends a position control command signal to the air conditioner dampers 14 & b based on the input signals from each sensor and switch. , and a position control command signal to the blowout 0 switching dampers j18a and be.

This digital] Nbuta is the so-called! It consists of a computer, a central processing unit (OP17) that accumulates arithmetic processing according to the + datagram, and a central processing unit (OP17) that accumulates arithmetic processing according to the
Temporary memory (RJLM) that can be written and read to temporarily store various data related to PH calculation processing
A one-chip II8 main part consists of a timing circuit that generates a reference clock pulse for arithmetic processing with a crystal oscillator s2, and an input/output car path that adjusts input/output signals.
(large-scale integrated circuits).

The drive circuits 14&, 4b, i16&, fi6b and Li17 generate signals for commanding the positions of the related actuators ssa and sgb, the air outlet switching actuators 8ma&, and m11sO, respectively, based on the signals from the computer j11. S3 is a manual mode switch for manually selecting the outlet, and a set temperature (test) for each air conditioning zone.
*tl, T...tg) This is an operation board that includes a temperature setting switch for changing the temperature. Regarding temperature settings, 4.
1Ml16 &-6841? [Publication No. 11-077 Demeun counter may be used.

FIG. s shows a control delgram for arithmetic processing in the digital computer 81&:. When the main switch is turned on, the digital computer 11 is supplied with power from the in-vehicle power source via a stabilized power supply circuit (not shown), and repeats the arithmetic processing shown in the figure at a cycle of several hundred meters.The control program receives signals from each input device. The receiver includes a signal input step 101. In this signal input step 101, the senna signals 16 to 19 m 81 are converted into octal code signals by the analog-to-digital conversion circuit SO.
Each detection signal of a e 8 l b is stored in a predetermined location of the RAM, and the switch signal from the changeover switch 18 is stored in a predetermined location of 1 person. Nine target temperatures that set the temperature for each air conditioning zone based on data indicating environmental conditions! Calculate the temperature τao of the air flow O from the ventilation angle 10 required to approach and hold -.tl, T..tl, respectively. This calculation is performed according to the following general formula using nine constants measured experimentally.

TAO = ＠ @tX〒trot-KrXτr-KIL
! IXT&1E1-1*XTs+0 However, Tset, Tr, Tam, and D- are Sen f15+
1'+1? and settings! I18) Obtained value, K1・
t.

Kr, &m, Km, and O are predetermined constants.

In this embodiment, there are eight temperature control sections, each of which can independently set nine temperatures, each with a constant temperature of 011! 's*t1. Calculate Tmut ol for Tsetg.

In the next calculation step 10g, the above calculation step 101
In order to actually obtain the air temperature 'rAO1゜TEMO2 from the air outlet 19.80, the required air mix damper position 4m, 14b position BWI, BWI can be calculated by
are calculated respectively. This calculation is performed by the following equations with reference to the actual heat exchange capabilities of the evaporator and heater, which are heat exchangers.

8W: (Tem o Tm)/(?v Tomi-DI)
XD Snow However, Tll and TV are the values obtained from Sen919.18, and I)1yDI is a predetermined constant.

In the next instruction step 104, the above calculation step flog
Air no Tsutasudanpat 4m, 14b position s calculated by
wR, sw, and the actual damper potential voltage rI+Ar! obtained by the sensors 81&, 31b. A position control command signal is given to the damper drive circuit 14 a y 14 b so that the latter approaches the former and falls within a predetermined intersection.

In step 10g, the operating point of the distribution damper 1a1.28b is calculated to determine the appropriate blowout mode in accordance with the temperature IIIjI quantity. In this case, the amount of temperature adjustment given to each air conditioning zone is calculated in step 101 and indicates the required output temperature value 'J'AOI, Tm02 or the adjustment opening degree of the air mix damper calculated in step 1 (ill). Value 8W,
, JiW, or the actual opening sensor O value r1. input in step 101. This example shows the required blowing air temperature T which is not affected by the actual heat exchange capacity in the heat exchanger 111m, III and which has no response delay.
MU011 and MU08 are used.

The heater 13 and the partition plate 1G+1' are insulated so that there is almost no thermal interaction in the amount of conditioned air passing through the eight passages lO·,lot, or the concentration of one side of the conditioned air is different from that of the other. If you ignore the slight attraction, each temperature is 11#lTA"IITA
By comparing the size of Og with a predetermined setting value 〒1゜711cho1, the switching mode (vent, pie level, toto) of each distribution device ssa, ssb &: can be determined. shows its switching characteristics.

In this embodiment, when there is mutual thermal influence in the dew temperature control section, a correction operation is performed so that the temperature-temperature characteristic of each outlet does not change due to the influence. It has become. tb, if the temperature rises in each air conditioning zone, use the air mix dampers 14m and 14b.
The adjustment position also changes.

As a result, a difference in ventilation resistance O occurs between both passages 10s and 10f, and the amount of air that passes through the gap between the partition plate 10 and the core fighting spirit and reaches other passages in k-18 is generated. , or due to heat conduction in the partition plate 104, etc., the temperature of the air actually blown out from the outlet is the originally calculated outlet temperature T^O1, TAO11.
Yopu also has a value close to the average of both.

To perform this correction, in step 105, a correction value DT is calculated by adding a predetermined constant to the difference in adjustment position SWlsvgO of the two air mix dampers, and the switching point is determined! ! Comparison value with required blowing temperature Tmu0 (IJ)? , ,? , ,
? , to correct. This calculation process is expressed mathematically as follows.

D = m
=〒l+DT? , /=T, +DT Ta' ”Tm +D T Tl =T, -DT T,'=?, -D? 't', ' :T, -D T In the above equation, switching points T1', τ1' , 1' is the first air mix damper 14 given the adjustment position svl.
The switching characteristics of the first switching damper jlla corresponding to m are determined, and the switching points T1', 71', and Ts' determine the switching characteristics of the eighth switching damper S8b. For reference,
The switching characteristics of the first switching damper j18m are shown in FIG.

In other words, the switching characteristics of each switching damper gsa gsb are corrected in accordance with the difference when there is a difference in the amount of temperature adjustment, and as a result, the vent outlet (29 &
, 80a), or from the heat outlet (2).
9b, 80'b) from being blown out.

In step 106, regarding the first switching damper l8a, the required blowing temperature TmuO1 obtained in step to11 is compared with the first switching point T, /~T3/ to determine the blowing mode. Based on the result of this determination, step lOff, 1
08.1019 &: Leave the switching damper! Similarly, in step 1106aN109, a blowout mode is determined for the first switching damper g8a, and a control command is given to the drive circuit g5b.

Thus, when the control program is repeated at high speed, the eleventh and eighth air mix dampers 141L.

14b is position-controlled so that the temperature of each air conditioning zone approaches each set value, and the temperature of the air blown from the outlet group 29.80 is changed. Then, the switching of each switching switch 381 and GSB is determined to correspond to each air excavation temperature, and the blowing mode is selected. By using that value, the amount of temperature adjustment for each air conditioning zone may be calculated independently.

Furthermore, the present invention can be applied to a case where there are eight or more temperature control sections, and in that case, as a method of correcting the switching point of the blowout mode, the adjustment amount of one temperature control section and the adjustment amount of another temperature control section can be adjusted. It is also possible to determine the correction amount based on the difference between the adjustment amount and the average value of the adjustment amount.

Alternatively, a temperature sensor may be provided in each passage 10, lof, and the detected value may be compared with a predetermined switching point to determine the position of the switching damper 18a%msb.

Furthermore, the present invention can of course be applied to the case where the air conditioning zones are divided into front seats and rear seats, rather than the driver's seat and passenger seat.

As described above, the present invention is capable of supplying air in nine blowing directions corresponding to the blowing air temperature from each blowing device facing each air conditioning zone when adjusting the temperature of each air conditioning zone in a vehicle interior; It has the advantage of being able to provide zone air conditioning that meets the wishes of each passenger.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, and FIG. 8 is a flowchart F1 showing the control program of the computer in FIG. FIG. 10...Ventilation Dan forming an air conditioning unit). 10 letters...partition plate, 10...lOf...aisle, lz
...Evaporator, 18...Heater, 18m, 14
a...A heater portion and an air mix damper forming a first temperature control device; 18b, 14b...A heater portion and an air mix damper forming a third temperature control device. $11--Digital computer that forms the main part of the control device, 25 m, 116 b.--Drive circuit, gy
a, gfu b...actuator, 18m, 18b...
・Air outlet switching damper forming the distribution device, g9,8G-・
・Air outlet group. Representative Patent Attorney Takashi Okabe

Claims (1)

[Claims] (1) A plane-divided first plane inside the vehicle interior. A first SO distribution device is provided facing each of the second air conditioning zones, and includes a first SO distribution device that changes the distribution pipe in the direction of air blowout for each air conditioning zone. a third air blowing device; The first air blowing device is provided in the air conditioning unit in order to independently change the temperature of the air supplied to each cabin air conditioning zone through the air blowing device O. a third temperature regulator;
and No. 1 above. The first. An air conditioner for an automobile, comprising: a control device that controls a third distribution device. (1) *Note 1. The first temperature joint device includes a heater core having eight parts arranged in each of passages formed by dividing an air conditioner into windows by a partition member, and two parts that adjust the amount of air bypassing the heater core in each passage. (8) The automotive air conditioner according to claim 2, wherein the heater core is integrally constructed. (4) The control device is the first control device. The air conditioner for an automobile according to claim 1, igs, or 8, which includes a correction operation for a deviation in the eighth temperature adjustment amount.